st.c revision 1.194.2.1
1 /* $NetBSD: st.c,v 1.194.2.1 2007/11/25 09:34:38 xtraeme Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 2004 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Originally written by Julian Elischer (julian (at) tfs.com) 41 * for TRW Financial Systems for use under the MACH(2.5) operating system. 42 * 43 * TRW Financial Systems, in accordance with their agreement with Carnegie 44 * Mellon University, makes this software available to CMU to distribute 45 * or use in any manner that they see fit as long as this message is kept with 46 * the software. For this reason TFS also grants any other persons or 47 * organisations permission to use or modify this software. 48 * 49 * TFS supplies this software to be publicly redistributed 50 * on the understanding that TFS is not responsible for the correct 51 * functioning of this software in any circumstances. 52 * 53 * Ported to run under 386BSD by Julian Elischer (julian (at) tfs.com) Sept 1992 54 * major changes by Julian Elischer (julian (at) jules.dialix.oz.au) May 1993 55 * 56 * A lot of rewhacking done by mjacob (mjacob (at) nas.nasa.gov). 57 */ 58 59 #include <sys/cdefs.h> 60 __KERNEL_RCSID(0, "$NetBSD: st.c,v 1.194.2.1 2007/11/25 09:34:38 xtraeme Exp $"); 61 62 #include "opt_scsi.h" 63 64 #include <sys/param.h> 65 #include <sys/systm.h> 66 #include <sys/fcntl.h> 67 #include <sys/errno.h> 68 #include <sys/ioctl.h> 69 #include <sys/malloc.h> 70 #include <sys/buf.h> 71 #include <sys/bufq.h> 72 #include <sys/proc.h> 73 #include <sys/user.h> 74 #include <sys/mtio.h> 75 #include <sys/device.h> 76 #include <sys/conf.h> 77 #include <sys/kernel.h> 78 #include <sys/vnode.h> 79 #include <sys/iostat.h> 80 #include <sys/sysctl.h> 81 82 #include <dev/scsipi/scsi_spc.h> 83 #include <dev/scsipi/scsipi_all.h> 84 #include <dev/scsipi/scsi_all.h> 85 #include <dev/scsipi/scsi_tape.h> 86 #include <dev/scsipi/scsipiconf.h> 87 #include <dev/scsipi/scsipi_base.h> 88 #include <dev/scsipi/stvar.h> 89 90 /* Defines for device specific stuff */ 91 #define DEF_FIXED_BSIZE 512 92 93 #define STMODE(z) ( minor(z) & 0x03) 94 #define STDSTY(z) ((minor(z) >> 2) & 0x03) 95 #define STUNIT(z) ((minor(z) >> 4) ) 96 #define STNMINOR 16 97 98 #define NORMAL_MODE 0 99 #define NOREW_MODE 1 100 #define EJECT_MODE 2 101 #define CTRL_MODE 3 102 103 #define FALSE 0 104 #define TRUE 1 105 106 #ifndef ST_MOUNT_DELAY 107 #define ST_MOUNT_DELAY 0 108 #endif 109 110 static dev_type_open(stopen); 111 static dev_type_close(stclose); 112 static dev_type_read(stread); 113 static dev_type_write(stwrite); 114 static dev_type_ioctl(stioctl); 115 static dev_type_strategy(ststrategy); 116 static dev_type_dump(stdump); 117 118 const struct bdevsw st_bdevsw = { 119 stopen, stclose, ststrategy, stioctl, stdump, nosize, D_TAPE 120 }; 121 122 const struct cdevsw st_cdevsw = { 123 stopen, stclose, stread, stwrite, stioctl, 124 nostop, notty, nopoll, nommap, nokqfilter, D_TAPE 125 }; 126 127 /* 128 * Define various devices that we know mis-behave in some way, 129 * and note how they are bad, so we can correct for them 130 */ 131 132 static const struct st_quirk_inquiry_pattern st_quirk_patterns[] = { 133 {{T_SEQUENTIAL, T_REMOV, 134 " ", " ", " "}, {0, 0, { 135 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 136 {ST_Q_FORCE_BLKSIZE, 512, QIC_24}, /* minor 4-7 */ 137 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_1600}, /* minor 8-11 */ 138 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_6250} /* minor 12-15 */ 139 }}}, 140 {{T_SEQUENTIAL, T_REMOV, 141 "TANDBERG", " TDC 3600 ", ""}, {0, 12, { 142 {0, 0, 0}, /* minor 0-3 */ 143 {ST_Q_FORCE_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 144 {0, 0, QIC_150}, /* minor 8-11 */ 145 {0, 0, QIC_120} /* minor 12-15 */ 146 }}}, 147 {{T_SEQUENTIAL, T_REMOV, 148 "TANDBERG", " TDC 3800 ", ""}, {0, 0, { 149 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 150 {0, 0, QIC_525}, /* minor 4-7 */ 151 {0, 0, QIC_150}, /* minor 8-11 */ 152 {0, 0, QIC_120} /* minor 12-15 */ 153 }}}, 154 {{T_SEQUENTIAL, T_REMOV, 155 "TANDBERG", " SLR5 4/8GB ", ""}, {0, 0, { 156 {ST_Q_FORCE_BLKSIZE, 1024, 0}, /* minor 0-3 */ 157 {0, 0, 0}, /* minor 4-7 */ 158 {0, 0, 0}, /* minor 8-11 */ 159 {0, 0, 0} /* minor 12-15 */ 160 }}}, 161 /* 162 * lacking a manual for the 4200, it's not clear what the 163 * specific density codes should be- the device is a 2.5GB 164 * capable QIC drive, those density codes aren't readily 165 * availabel. The 'default' will just have to do. 166 */ 167 {{T_SEQUENTIAL, T_REMOV, 168 "TANDBERG", " TDC 4200 ", ""}, {0, 0, { 169 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 170 {0, 0, QIC_525}, /* minor 4-7 */ 171 {0, 0, QIC_150}, /* minor 8-11 */ 172 {0, 0, QIC_120} /* minor 12-15 */ 173 }}}, 174 /* 175 * At least -005 and -007 need this. I'll assume they all do unless I 176 * hear otherwise. - mycroft, 31MAR1994 177 */ 178 {{T_SEQUENTIAL, T_REMOV, 179 "ARCHIVE ", "VIPER 2525 25462", ""}, {0, 0, { 180 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 181 {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ 182 {0, 0, QIC_150}, /* minor 8-11 */ 183 {0, 0, QIC_120} /* minor 12-15 */ 184 }}}, 185 /* 186 * One user reports that this works for his tape drive. It probably 187 * needs more work. - mycroft, 09APR1994 188 */ 189 {{T_SEQUENTIAL, T_REMOV, 190 "SANKYO ", "CP525 ", ""}, {0, 0, { 191 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 192 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 193 {0, 0, QIC_150}, /* minor 8-11 */ 194 {0, 0, QIC_120} /* minor 12-15 */ 195 }}}, 196 {{T_SEQUENTIAL, T_REMOV, 197 "ANRITSU ", "DMT780 ", ""}, {0, 0, { 198 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 199 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 200 {0, 0, QIC_150}, /* minor 8-11 */ 201 {0, 0, QIC_120} /* minor 12-15 */ 202 }}}, 203 {{T_SEQUENTIAL, T_REMOV, 204 "ARCHIVE ", "VIPER 150 21247", ""}, {ST_Q_ERASE_NOIMM, 12, { 205 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 206 {0, 0, QIC_150}, /* minor 4-7 */ 207 {0, 0, QIC_120}, /* minor 8-11 */ 208 {0, 0, QIC_24} /* minor 12-15 */ 209 }}}, 210 {{T_SEQUENTIAL, T_REMOV, 211 "ARCHIVE ", "VIPER 150 21531", ""}, {ST_Q_ERASE_NOIMM, 12, { 212 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 213 {0, 0, QIC_150}, /* minor 4-7 */ 214 {0, 0, QIC_120}, /* minor 8-11 */ 215 {0, 0, QIC_24} /* minor 12-15 */ 216 }}}, 217 {{T_SEQUENTIAL, T_REMOV, 218 "WANGTEK ", "5099ES SCSI", ""}, {0, 0, { 219 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 220 {0, 0, QIC_11}, /* minor 4-7 */ 221 {0, 0, QIC_24}, /* minor 8-11 */ 222 {0, 0, QIC_24} /* minor 12-15 */ 223 }}}, 224 {{T_SEQUENTIAL, T_REMOV, 225 "WANGTEK ", "5150ES SCSI", ""}, {0, 0, { 226 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 227 {0, 0, QIC_24}, /* minor 4-7 */ 228 {0, 0, QIC_120}, /* minor 8-11 */ 229 {0, 0, QIC_150} /* minor 12-15 */ 230 }}}, 231 {{T_SEQUENTIAL, T_REMOV, 232 "WANGTEK ", "5525ES SCSI REV7", ""}, {0, 0, { 233 {0, 0, 0}, /* minor 0-3 */ 234 {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 235 {0, 0, QIC_150}, /* minor 8-11 */ 236 {0, 0, QIC_120} /* minor 12-15 */ 237 }}}, 238 {{T_SEQUENTIAL, T_REMOV, 239 "WangDAT ", "Model 1300 ", ""}, {0, 0, { 240 {0, 0, 0}, /* minor 0-3 */ 241 {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ 242 {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ 243 {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ 244 }}}, 245 {{T_SEQUENTIAL, T_REMOV, 246 "EXABYTE ", "EXB-8200 ", "263H"}, {0, 5, { 247 {0, 0, 0}, /* minor 0-3 */ 248 {0, 0, 0}, /* minor 4-7 */ 249 {0, 0, 0}, /* minor 8-11 */ 250 {0, 0, 0} /* minor 12-15 */ 251 }}}, 252 {{T_SEQUENTIAL, T_REMOV, 253 "STK", "9490", ""}, 254 {ST_Q_FORCE_BLKSIZE, 0, { 255 {0, 0, 0}, /* minor 0-3 */ 256 {0, 0, 0}, /* minor 4-7 */ 257 {0, 0, 0}, /* minor 8-11 */ 258 {0, 0, 0} /* minor 12-15 */ 259 }}}, 260 {{T_SEQUENTIAL, T_REMOV, 261 "STK", "SD-3", ""}, 262 {ST_Q_FORCE_BLKSIZE, 0, { 263 {0, 0, 0}, /* minor 0-3 */ 264 {0, 0, 0}, /* minor 4-7 */ 265 {0, 0, 0}, /* minor 8-11 */ 266 {0, 0, 0} /* minor 12-15 */ 267 }}}, 268 {{T_SEQUENTIAL, T_REMOV, 269 "IBM", "03590", ""}, {ST_Q_IGNORE_LOADS, 0, { 270 {0, 0, 0}, /* minor 0-3 */ 271 {0, 0, 0}, /* minor 4-7 */ 272 {0, 0, 0}, /* minor 8-11 */ 273 {0, 0, 0} /* minor 12-15 */ 274 }}}, 275 {{T_SEQUENTIAL, T_REMOV, 276 "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL, 0, { 277 {0, 0, QIC_3095}, /* minor 0-3 */ 278 {0, 0, QIC_3095}, /* minor 4-7 */ 279 {0, 0, QIC_3095}, /* minor 8-11 */ 280 {0, 0, QIC_3095}, /* minor 12-15 */ 281 }}}, 282 #if 0 283 {{T_SEQUENTIAL, T_REMOV, 284 "EXABYTE ", "EXB-8200 ", ""}, {0, 12, { 285 {0, 0, 0}, /* minor 0-3 */ 286 {0, 0, 0}, /* minor 4-7 */ 287 {0, 0, 0}, /* minor 8-11 */ 288 {0, 0, 0} /* minor 12-15 */ 289 }}}, 290 #endif 291 {{T_SEQUENTIAL, T_REMOV, 292 "TEAC ", "MT-2ST/N50 ", ""}, {ST_Q_IGNORE_LOADS, 0, { 293 {0, 0, 0}, /* minor 0-3 */ 294 {0, 0, 0}, /* minor 4-7 */ 295 {0, 0, 0}, /* minor 8-11 */ 296 {0, 0, 0} /* minor 12-15 */ 297 }}}, 298 {{T_SEQUENTIAL, T_REMOV, 299 "OnStream", "ADR50 Drive", ""}, {ST_Q_UNIMODAL, 0, { 300 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 301 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 4-7 */ 302 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 303 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 12-15 */ 304 }}}, 305 {{T_SEQUENTIAL, T_REMOV, 306 "OnStream DI-30", "", "1.0"}, {ST_Q_NOFILEMARKS, 0, { 307 {0, 0, 0}, /* minor 0-3 */ 308 {0, 0, 0}, /* minor 4-7 */ 309 {0, 0, 0}, /* minor 8-11 */ 310 {0, 0, 0} /* minor 12-15 */ 311 }}}, 312 {{T_SEQUENTIAL, T_REMOV, 313 "NCR H621", "0-STD-03-46F880 ", ""}, {ST_Q_NOPREVENT, 0, { 314 {0, 0, 0}, /* minor 0-3 */ 315 {0, 0, 0}, /* minor 4-7 */ 316 {0, 0, 0}, /* minor 8-11 */ 317 {0, 0, 0} /* minor 12-15 */ 318 }}}, 319 }; 320 321 #define NOEJECT 0 322 #define EJECT 1 323 324 static void st_identify_drive(struct st_softc *, 325 struct scsipi_inquiry_pattern *); 326 static void st_loadquirks(struct st_softc *); 327 static int st_mount_tape(dev_t, int); 328 static void st_unmount(struct st_softc *, boolean); 329 static int st_decide_mode(struct st_softc *, boolean); 330 static void ststart(struct scsipi_periph *); 331 static void strestart(void *); 332 static void stdone(struct scsipi_xfer *, int); 333 static int st_read(struct st_softc *, char *, int, int); 334 static int st_space(struct st_softc *, int, u_int, int); 335 static int st_write_filemarks(struct st_softc *, int, int); 336 static int st_check_eod(struct st_softc *, boolean, int *, int); 337 static int st_load(struct st_softc *, u_int, int); 338 static int st_rewind(struct st_softc *, u_int, int); 339 static int st_interpret_sense(struct scsipi_xfer *); 340 static int st_touch_tape(struct st_softc *); 341 static int st_erase(struct st_softc *, int full, int flags); 342 static int st_rdpos(struct st_softc *, int, u_int32_t *); 343 static int st_setpos(struct st_softc *, int, u_int32_t *); 344 345 static const struct scsipi_periphsw st_switch = { 346 st_interpret_sense, 347 ststart, 348 NULL, 349 stdone 350 }; 351 352 #if defined(ST_ENABLE_EARLYWARN) 353 #define ST_INIT_FLAGS ST_EARLYWARN 354 #else 355 #define ST_INIT_FLAGS 0 356 #endif 357 358 /* 359 * The routine called by the low level scsi routine when it discovers 360 * A device suitable for this driver 361 */ 362 void 363 stattach(struct device *parent, struct st_softc *st, void *aux) 364 { 365 struct scsipibus_attach_args *sa = aux; 366 struct scsipi_periph *periph = sa->sa_periph; 367 368 SC_DEBUG(periph, SCSIPI_DB2, ("stattach: ")); 369 370 /* 371 * Store information needed to contact our base driver 372 */ 373 st->sc_periph = periph; 374 periph->periph_dev = &st->sc_dev; 375 periph->periph_switch = &st_switch; 376 377 /* 378 * Set initial flags 379 */ 380 381 st->flags = ST_INIT_FLAGS; 382 383 /* 384 * Set up the buf queue for this device 385 */ 386 bufq_alloc(&st->buf_queue, "fcfs", 0); 387 388 callout_init(&st->sc_callout); 389 390 /* 391 * Check if the drive is a known criminal and take 392 * Any steps needed to bring it into line 393 */ 394 st_identify_drive(st, &sa->sa_inqbuf); 395 /* 396 * Use the subdriver to request information regarding the drive. 397 */ 398 printf("\n"); 399 printf("%s: %s", st->sc_dev.dv_xname, st->quirkdata ? "quirks apply, " : ""); 400 if (scsipi_test_unit_ready(periph, 401 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || 402 st->ops(st, ST_OPS_MODESENSE, 403 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE)) 404 printf("drive empty\n"); 405 else { 406 printf("density code %d, ", st->media_density); 407 if (st->media_blksize > 0) 408 printf("%d-byte", st->media_blksize); 409 else 410 printf("variable"); 411 printf(" blocks, write-%s\n", 412 (st->flags & ST_READONLY) ? "protected" : "enabled"); 413 } 414 415 st->stats = iostat_alloc(IOSTAT_TAPE, parent, st->sc_dev.dv_xname); 416 417 #if NRND > 0 418 rnd_attach_source(&st->rnd_source, st->sc_dev.dv_xname, 419 RND_TYPE_TAPE, 0); 420 #endif 421 } 422 423 int 424 stactivate(struct device *self, enum devact act) 425 { 426 int rv = 0; 427 428 switch (act) { 429 case DVACT_ACTIVATE: 430 rv = EOPNOTSUPP; 431 break; 432 433 case DVACT_DEACTIVATE: 434 /* 435 * Nothing to do; we key off the device's DVF_ACTIVE. 436 */ 437 break; 438 } 439 return (rv); 440 } 441 442 int 443 stdetach(struct device *self, int flags) 444 { 445 struct st_softc *st = device_private(self); 446 int s, bmaj, cmaj, mn; 447 448 /* locate the major number */ 449 bmaj = bdevsw_lookup_major(&st_bdevsw); 450 cmaj = cdevsw_lookup_major(&st_cdevsw); 451 452 /* kill any pending restart */ 453 callout_stop(&st->sc_callout); 454 455 s = splbio(); 456 457 /* Kill off any queued buffers. */ 458 bufq_drain(st->buf_queue); 459 460 bufq_free(st->buf_queue); 461 462 /* Kill off any pending commands. */ 463 scsipi_kill_pending(st->sc_periph); 464 465 splx(s); 466 467 /* Nuke the vnodes for any open instances */ 468 mn = STUNIT(device_unit(self)); 469 vdevgone(bmaj, mn, mn+STNMINOR-1, VBLK); 470 vdevgone(cmaj, mn, mn+STNMINOR-1, VCHR); 471 472 iostat_free(st->stats); 473 474 #if NRND > 0 475 /* Unhook the entropy source. */ 476 rnd_detach_source(&st->rnd_source); 477 #endif 478 479 return (0); 480 } 481 482 /* 483 * Use the inquiry routine in 'scsi_base' to get drive info so we can 484 * Further tailor our behaviour. 485 */ 486 static void 487 st_identify_drive(struct st_softc *st, struct scsipi_inquiry_pattern *inqbuf) 488 { 489 const struct st_quirk_inquiry_pattern *finger; 490 int priority; 491 492 finger = scsipi_inqmatch(inqbuf, 493 st_quirk_patterns, 494 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 495 sizeof(st_quirk_patterns[0]), &priority); 496 if (priority != 0) { 497 st->quirkdata = &finger->quirkdata; 498 st->drive_quirks = finger->quirkdata.quirks; 499 st->quirks = finger->quirkdata.quirks; /* start value */ 500 st->page_0_size = finger->quirkdata.page_0_size; 501 st_loadquirks(st); 502 } 503 } 504 505 /* 506 * initialise the subdevices to the default (QUIRK) state. 507 * this will remove any setting made by the system operator or previous 508 * operations. 509 */ 510 static void 511 st_loadquirks(struct st_softc *st) 512 { 513 int i; 514 const struct modes *mode; 515 struct modes *mode2; 516 517 mode = st->quirkdata->modes; 518 mode2 = st->modes; 519 for (i = 0; i < 4; i++) { 520 memset(mode2, 0, sizeof(struct modes)); 521 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 522 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 523 DENSITY_SET_BY_USER); 524 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 525 mode2->blksize = mode->blksize; 526 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 527 } 528 if (mode->density) { 529 mode2->density = mode->density; 530 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 531 } 532 mode2->quirks |= mode->quirks; 533 mode++; 534 mode2++; 535 } 536 } 537 538 /* 539 * open the device. 540 */ 541 static int 542 stopen(dev_t dev, int flags, int mode, struct lwp *l) 543 { 544 u_int stmode, dsty; 545 int error, sflags, unit, tries, ntries; 546 struct st_softc *st; 547 struct scsipi_periph *periph; 548 struct scsipi_adapter *adapt; 549 550 unit = STUNIT(dev); 551 if (unit >= st_cd.cd_ndevs) 552 return (ENXIO); 553 st = st_cd.cd_devs[unit]; 554 if (st == NULL) 555 return (ENXIO); 556 557 stmode = STMODE(dev); 558 dsty = STDSTY(dev); 559 560 periph = st->sc_periph; 561 adapt = periph->periph_channel->chan_adapter; 562 563 SC_DEBUG(periph, SCSIPI_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev, 564 unit, st_cd.cd_ndevs)); 565 566 567 /* 568 * Only allow one at a time 569 */ 570 if (periph->periph_flags & PERIPH_OPEN) { 571 printf("%s: already open\n", st->sc_dev.dv_xname); 572 return (EBUSY); 573 } 574 575 if ((error = scsipi_adapter_addref(adapt)) != 0) 576 return (error); 577 578 /* 579 * clear any latched errors. 580 */ 581 st->mt_resid = 0; 582 st->mt_erreg = 0; 583 st->asc = 0; 584 st->ascq = 0; 585 586 /* 587 * Catch any unit attention errors. Be silent about this 588 * unless we're already mounted. We ignore media change 589 * if we're in control mode or not mounted yet. 590 */ 591 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 592 #ifdef SCSIDEBUG 593 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 594 #else 595 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 596 #endif 597 } else 598 sflags = 0; 599 600 /* 601 * If we're already mounted or we aren't configured for 602 * a mount delay, only try a test unit ready once. Otherwise, 603 * try up to ST_MOUNT_DELAY times with a rest interval of 604 * one second between each try. 605 */ 606 607 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) { 608 ntries = 1; 609 } else { 610 ntries = ST_MOUNT_DELAY; 611 } 612 613 for (error = tries = 0; tries < ntries; tries++) { 614 int slpintr, oflags; 615 616 /* 617 * If we had no error, or we're opening the control mode 618 * device, we jump out right away. 619 */ 620 621 error = scsipi_test_unit_ready(periph, sflags); 622 if (error == 0 || stmode == CTRL_MODE) { 623 break; 624 } 625 626 /* 627 * We had an error. 628 * 629 * If we're already mounted or we aren't configured for 630 * a mount delay, or the error isn't a NOT READY error, 631 * skip to the error exit now. 632 */ 633 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 634 (st->mt_key != SKEY_NOT_READY)) { 635 goto bad; 636 } 637 638 /* 639 * clear any latched errors. 640 */ 641 st->mt_resid = 0; 642 st->mt_erreg = 0; 643 st->asc = 0; 644 st->ascq = 0; 645 646 /* 647 * Fake that we have the device open so 648 * we block other apps from getting in. 649 */ 650 651 oflags = periph->periph_flags; 652 periph->periph_flags |= PERIPH_OPEN; 653 654 slpintr = tsleep(&lbolt, PUSER|PCATCH, "stload", 0); 655 656 periph->periph_flags = oflags; /* restore flags */ 657 if (slpintr) { 658 goto bad; 659 } 660 } 661 662 663 /* 664 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 665 * been opened to set defaults and perform other, usually non-I/O 666 * related, operations. In this case, do a quick check to see 667 * whether the unit actually had a tape loaded (this will be known 668 * as to whether or not we got a NOT READY for the above 669 * unit attention). If a tape is there, go do a mount sequence. 670 */ 671 if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { 672 periph->periph_flags |= PERIPH_OPEN; 673 return (0); 674 } 675 676 /* 677 * If we get this far and had an error set, that means we failed 678 * to pass the 'test unit ready' test for the non-controlmode device, 679 * so we bounce the open. 680 */ 681 682 if (error) 683 return (error); 684 685 /* 686 * Else, we're now committed to saying we're open. 687 */ 688 689 periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ 690 691 /* 692 * If it's a different mode, or if the media has been 693 * invalidated, unmount the tape from the previous 694 * session but continue with open processing 695 */ 696 if (st->last_dsty != dsty || 697 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 698 st_unmount(st, NOEJECT); 699 700 /* 701 * If we are not mounted, then we should start a new 702 * mount session. 703 */ 704 if (!(st->flags & ST_MOUNTED)) { 705 if ((error = st_mount_tape(dev, flags)) != 0) 706 goto bad; 707 st->last_dsty = dsty; 708 } 709 if (!(st->quirks & ST_Q_NOPREVENT)) { 710 scsipi_prevent(periph, SPAMR_PREVENT_DT, 711 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 712 } 713 714 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 715 return (0); 716 717 bad: 718 st_unmount(st, NOEJECT); 719 scsipi_adapter_delref(adapt); 720 periph->periph_flags &= ~PERIPH_OPEN; 721 return (error); 722 } 723 724 /* 725 * close the device.. only called if we are the LAST 726 * occurence of an open device 727 */ 728 static int 729 stclose(dev_t dev, int flags, int mode, struct lwp *l) 730 { 731 int stxx, error = 0; 732 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 733 struct scsipi_periph *periph = st->sc_periph; 734 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 735 736 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n")); 737 738 /* 739 * Make sure that a tape opened in write-only mode will have 740 * file marks written on it when closed, even if not written to. 741 * 742 * This is for SUN compatibility. Actually, the Sun way of 743 * things is to: 744 * 745 * only write filemarks if there are fmks to be written and 746 * - open for write (possibly read/write) 747 * - the last operation was a write 748 * or: 749 * - opened for wronly 750 * - no data was written (including filemarks) 751 */ 752 753 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 754 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 755 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 756 int nm; 757 error = st_check_eod(st, FALSE, &nm, 0); 758 } 759 760 /* 761 * Allow robots to eject tape if needed. 762 */ 763 scsipi_prevent(periph, SPAMR_ALLOW, 764 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 765 766 switch (STMODE(dev)) { 767 case NORMAL_MODE: 768 st_unmount(st, NOEJECT); 769 break; 770 case NOREW_MODE: 771 case CTRL_MODE: 772 /* 773 * Leave mounted unless media seems to have been removed. 774 * 775 * Otherwise, if we're to terminate a tape with more than one 776 * filemark [ and because we're not rewinding here ], backspace 777 * one filemark so that later appends will see an unbroken 778 * sequence of: 779 * 780 * file - FMK - file - FMK ... file - FMK FMK (EOM) 781 */ 782 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 783 st_unmount(st, NOEJECT); 784 } else if (error == 0) { 785 /* 786 * ST_WRITTEN was preserved from above. 787 * 788 * All we need to know here is: 789 * 790 * Were we writing this tape and was the last 791 * operation a write? 792 * 793 * Are there supposed to be 2FM at EOD? 794 * 795 * If both statements are true, then we backspace 796 * one filemark. 797 */ 798 stxx |= (st->flags & ST_2FM_AT_EOD); 799 if ((flags & FWRITE) != 0 && 800 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 801 error = st_space(st, -1, SP_FILEMARKS, 0); 802 } 803 } 804 break; 805 case EJECT_MODE: 806 st_unmount(st, EJECT); 807 break; 808 } 809 810 scsipi_wait_drain(periph); 811 812 scsipi_adapter_delref(adapt); 813 periph->periph_flags &= ~PERIPH_OPEN; 814 815 return (error); 816 } 817 818 /* 819 * Start a new mount session. 820 * Copy in all the default parameters from the selected device mode. 821 * and try guess any that seem to be defaulted. 822 */ 823 static int 824 st_mount_tape(dev_t dev, int flags) 825 { 826 int unit; 827 u_int dsty; 828 struct st_softc *st; 829 struct scsipi_periph *periph; 830 int error = 0; 831 832 unit = STUNIT(dev); 833 dsty = STDSTY(dev); 834 st = st_cd.cd_devs[unit]; 835 periph = st->sc_periph; 836 837 if (st->flags & ST_MOUNTED) 838 return (0); 839 840 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 841 st->flags |= ST_NEW_MOUNT; 842 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 843 /* 844 * If the media is new, then make sure we give it a chance to 845 * to do a 'load' instruction. (We assume it is new.) 846 */ 847 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 848 return (error); 849 /* 850 * Throw another dummy instruction to catch 851 * 'Unit attention' errors. Many drives give 852 * these after doing a Load instruction (with 853 * the MEDIUM MAY HAVE CHANGED asc/ascq). 854 */ 855 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 856 857 /* 858 * Some devices can't tell you much until they have been 859 * asked to look at the media. This quirk does this. 860 */ 861 if (st->quirks & ST_Q_SENSE_HELP) 862 if ((error = st_touch_tape(st)) != 0) 863 return (error); 864 /* 865 * Load the physical device parameters 866 * loads: blkmin, blkmax 867 */ 868 if ((error = st->ops(st, ST_OPS_RBL, 0)) != 0) 869 return (error); 870 /* 871 * Load the media dependent parameters 872 * includes: media_blksize,media_density,numblks 873 * As we have a tape in, it should be reflected here. 874 * If not you may need the "quirk" above. 875 */ 876 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 877 return (error); 878 /* 879 * If we have gained a permanent density from somewhere, 880 * then use it in preference to the one supplied by 881 * default by the driver. 882 */ 883 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 884 st->density = st->modes[dsty].density; 885 else 886 st->density = st->media_density; 887 /* 888 * If we have gained a permanent blocksize 889 * then use it in preference to the one supplied by 890 * default by the driver. 891 */ 892 st->flags &= ~ST_FIXEDBLOCKS; 893 if (st->modeflags[dsty] & 894 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 895 st->blksize = st->modes[dsty].blksize; 896 if (st->blksize) 897 st->flags |= ST_FIXEDBLOCKS; 898 } else { 899 if ((error = st_decide_mode(st, FALSE)) != 0) 900 return (error); 901 } 902 if ((error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 903 /* ATAPI will return ENODEV for this, and this may be OK */ 904 if (error != ENODEV) { 905 printf("%s: cannot set selected mode\n", 906 st->sc_dev.dv_xname); 907 return (error); 908 } 909 } 910 st->flags &= ~ST_NEW_MOUNT; 911 st->flags |= ST_MOUNTED; 912 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 913 st->blkno = st->fileno = (daddr_t) 0; 914 return (0); 915 } 916 917 /* 918 * End the present mount session. 919 * Rewind, and optionally eject the tape. 920 * Reset various flags to indicate that all new 921 * operations require another mount operation 922 */ 923 static void 924 st_unmount(struct st_softc *st, boolean eject) 925 { 926 struct scsipi_periph *periph = st->sc_periph; 927 int nmarks; 928 929 if ((st->flags & ST_MOUNTED) == 0) 930 return; 931 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 932 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 933 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 934 935 /* 936 * Section 9.3.3 of the SCSI specs states that a device shall return 937 * the density value specified in the last succesfull MODE SELECT 938 * after an unload operation, in case it is not able to 939 * automatically determine the density of the new medium. 940 * 941 * So we instruct the device to use the default density, which will 942 * prevent the use of stale density values (in particular, 943 * in st_touch_tape(). 944 */ 945 st->density = 0; 946 if (st->ops(st, ST_OPS_MODESELECT, 0) != 0) { 947 printf("%s: WARNING: cannot revert to default density\n", 948 st->sc_dev.dv_xname); 949 } 950 951 if (eject) { 952 if (!(st->quirks & ST_Q_NOPREVENT)) { 953 scsipi_prevent(periph, SPAMR_ALLOW, 954 XS_CTL_IGNORE_ILLEGAL_REQUEST | 955 XS_CTL_IGNORE_NOT_READY); 956 } 957 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 958 st->blkno = st->fileno = (daddr_t) -1; 959 } else { 960 st->blkno = st->fileno = (daddr_t) 0; 961 } 962 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 963 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 964 } 965 966 /* 967 * Given all we know about the device, media, mode, 'quirks' and 968 * initial operation, make a decision as to how we should be set 969 * to run (regarding blocking and EOD marks) 970 */ 971 int 972 st_decide_mode(struct st_softc *st, boolean first_read) 973 { 974 975 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 976 977 /* 978 * If the drive can only handle fixed-length blocks and only at 979 * one size, perhaps we should just do that. 980 */ 981 if (st->blkmin && (st->blkmin == st->blkmax)) { 982 st->flags |= ST_FIXEDBLOCKS; 983 st->blksize = st->blkmin; 984 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 985 ("blkmin == blkmax of %d\n", st->blkmin)); 986 goto done; 987 } 988 /* 989 * If the tape density mandates (or even suggests) use of fixed 990 * or variable-length blocks, comply. 991 */ 992 switch (st->density) { 993 case HALFINCH_800: 994 case HALFINCH_1600: 995 case HALFINCH_6250: 996 case DDS: 997 st->flags &= ~ST_FIXEDBLOCKS; 998 st->blksize = 0; 999 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1000 ("density specified variable\n")); 1001 goto done; 1002 case QIC_11: 1003 case QIC_24: 1004 case QIC_120: 1005 case QIC_150: 1006 case QIC_525: 1007 case QIC_1320: 1008 case QIC_3095: 1009 case QIC_3220: 1010 st->flags |= ST_FIXEDBLOCKS; 1011 if (st->media_blksize > 0) 1012 st->blksize = st->media_blksize; 1013 else 1014 st->blksize = DEF_FIXED_BSIZE; 1015 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1016 ("density specified fixed\n")); 1017 goto done; 1018 } 1019 /* 1020 * If we're about to read the tape, perhaps we should choose 1021 * fixed or variable-length blocks and block size according to 1022 * what the drive found on the tape. 1023 */ 1024 if (first_read && 1025 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 1026 (st->media_blksize == DEF_FIXED_BSIZE) || 1027 (st->media_blksize == 1024))) { 1028 if (st->media_blksize > 0) 1029 st->flags |= ST_FIXEDBLOCKS; 1030 else 1031 st->flags &= ~ST_FIXEDBLOCKS; 1032 st->blksize = st->media_blksize; 1033 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1034 ("Used media_blksize of %d\n", st->media_blksize)); 1035 goto done; 1036 } 1037 /* 1038 * We're getting no hints from any direction. Choose variable- 1039 * length blocks arbitrarily. 1040 */ 1041 st->flags &= ~ST_FIXEDBLOCKS; 1042 st->blksize = 0; 1043 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1044 ("Give up and default to variable mode\n")); 1045 1046 done: 1047 /* 1048 * Decide whether or not to write two file marks to signify end- 1049 * of-data. Make the decision as a function of density. If 1050 * the decision is not to use a second file mark, the SCSI BLANK 1051 * CHECK condition code will be recognized as end-of-data when 1052 * first read. 1053 * (I think this should be a by-product of fixed/variable..julian) 1054 */ 1055 switch (st->density) { 1056 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 1057 case QIC_11: 1058 case QIC_24: 1059 case QIC_120: 1060 case QIC_150: 1061 case QIC_525: 1062 case QIC_1320: 1063 case QIC_3095: 1064 case QIC_3220: 1065 st->flags &= ~ST_2FM_AT_EOD; 1066 break; 1067 default: 1068 st->flags |= ST_2FM_AT_EOD; 1069 } 1070 return (0); 1071 } 1072 1073 /* 1074 * Actually translate the requested transfer into 1075 * one the physical driver can understand 1076 * The transfer is described by a buf and will include 1077 * only one physical transfer. 1078 */ 1079 static void 1080 ststrategy(struct buf *bp) 1081 { 1082 struct st_softc *st = st_cd.cd_devs[STUNIT(bp->b_dev)]; 1083 int s; 1084 1085 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1086 ("ststrategy %d bytes @ blk %" PRId64 "\n", bp->b_bcount, bp->b_blkno)); 1087 /* 1088 * If it's a null transfer, return immediatly 1089 */ 1090 if (bp->b_bcount == 0) 1091 goto done; 1092 1093 /* If offset is negative, error */ 1094 if (bp->b_blkno < 0) { 1095 bp->b_error = EINVAL; 1096 goto bad; 1097 } 1098 1099 /* 1100 * Odd sized request on fixed drives are verboten 1101 */ 1102 if (st->flags & ST_FIXEDBLOCKS) { 1103 if (bp->b_bcount % st->blksize) { 1104 printf("%s: bad request, must be multiple of %d\n", 1105 st->sc_dev.dv_xname, st->blksize); 1106 bp->b_error = EIO; 1107 goto bad; 1108 } 1109 } 1110 /* 1111 * as are out-of-range requests on variable drives. 1112 */ 1113 else if (bp->b_bcount < st->blkmin || 1114 (st->blkmax && bp->b_bcount > st->blkmax)) { 1115 printf("%s: bad request, must be between %d and %d\n", 1116 st->sc_dev.dv_xname, st->blkmin, st->blkmax); 1117 bp->b_error = EIO; 1118 goto bad; 1119 } 1120 s = splbio(); 1121 1122 /* 1123 * Place it in the queue of activities for this tape 1124 * at the end (a bit silly because we only have on user.. 1125 * (but it could fork())) 1126 */ 1127 BUFQ_PUT(st->buf_queue, bp); 1128 1129 /* 1130 * Tell the device to get going on the transfer if it's 1131 * not doing anything, otherwise just wait for completion 1132 * (All a bit silly if we're only allowing 1 open but..) 1133 */ 1134 ststart(st->sc_periph); 1135 1136 splx(s); 1137 return; 1138 bad: 1139 bp->b_flags |= B_ERROR; 1140 done: 1141 /* 1142 * Correctly set the buf to indicate a completed xfer 1143 */ 1144 bp->b_resid = bp->b_bcount; 1145 biodone(bp); 1146 return; 1147 } 1148 1149 /* 1150 * ststart looks to see if there is a buf waiting for the device 1151 * and that the device is not already busy. If both are true, 1152 * It dequeues the buf and creates a scsi command to perform the 1153 * transfer required. The transfer request will call scsipi_done 1154 * on completion, which will in turn call this routine again 1155 * so that the next queued transfer is performed. 1156 * The bufs are queued by the strategy routine (ststrategy) 1157 * 1158 * This routine is also called after other non-queued requests 1159 * have been made of the scsi driver, to ensure that the queue 1160 * continues to be drained. 1161 * ststart() is called at splbio 1162 */ 1163 static void 1164 ststart(struct scsipi_periph *periph) 1165 { 1166 struct st_softc *st = (void *)periph->periph_dev; 1167 struct buf *bp; 1168 struct scsi_rw_tape cmd; 1169 struct scsipi_xfer *xs; 1170 int flags, error; 1171 1172 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1173 /* 1174 * See if there is a buf to do and we are not already 1175 * doing one 1176 */ 1177 while (periph->periph_active < periph->periph_openings) { 1178 /* if a special awaits, let it proceed first */ 1179 if (periph->periph_flags & PERIPH_WAITING) { 1180 periph->periph_flags &= ~PERIPH_WAITING; 1181 wakeup((caddr_t)periph); 1182 return; 1183 } 1184 1185 /* 1186 * If the device has been unmounted by the user 1187 * then throw away all requests until done. 1188 */ 1189 if (__predict_false((st->flags & ST_MOUNTED) == 0 || 1190 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0)) { 1191 if ((bp = BUFQ_GET(st->buf_queue)) != NULL) { 1192 /* make sure that one implies the other.. */ 1193 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 1194 bp->b_flags |= B_ERROR; 1195 bp->b_error = EIO; 1196 bp->b_resid = bp->b_bcount; 1197 biodone(bp); 1198 continue; 1199 } else { 1200 return; 1201 } 1202 } 1203 1204 if ((bp = BUFQ_PEEK(st->buf_queue)) == NULL) 1205 return; 1206 1207 iostat_busy(st->stats); 1208 1209 /* 1210 * only FIXEDBLOCK devices have pending I/O or space operations. 1211 */ 1212 if (st->flags & ST_FIXEDBLOCKS) { 1213 /* 1214 * If we are at a filemark but have not reported it yet 1215 * then we should report it now 1216 */ 1217 if (st->flags & ST_AT_FILEMARK) { 1218 if ((bp->b_flags & B_READ) == B_WRITE) { 1219 /* 1220 * Handling of ST_AT_FILEMARK in 1221 * st_space will fill in the right file 1222 * mark count. 1223 * Back up over filemark 1224 */ 1225 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1226 BUFQ_GET(st->buf_queue); 1227 bp->b_flags |= B_ERROR; 1228 bp->b_error = EIO; 1229 bp->b_resid = bp->b_bcount; 1230 biodone(bp); 1231 continue; 1232 } 1233 } else { 1234 BUFQ_GET(st->buf_queue); 1235 bp->b_resid = bp->b_bcount; 1236 bp->b_error = 0; 1237 bp->b_flags &= ~B_ERROR; 1238 st->flags &= ~ST_AT_FILEMARK; 1239 biodone(bp); 1240 continue; /* seek more work */ 1241 } 1242 } 1243 } 1244 /* 1245 * If we are at EOM but have not reported it 1246 * yet then we should report it now. 1247 */ 1248 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1249 BUFQ_GET(st->buf_queue); 1250 bp->b_resid = bp->b_bcount; 1251 if (st->flags & ST_EIO_PENDING) { 1252 bp->b_error = EIO; 1253 bp->b_flags |= B_ERROR; 1254 } 1255 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1256 biodone(bp); 1257 continue; /* seek more work */ 1258 } 1259 1260 /* 1261 * Fill out the scsi command 1262 */ 1263 memset(&cmd, 0, sizeof(cmd)); 1264 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1265 if ((bp->b_flags & B_READ) == B_WRITE) { 1266 cmd.opcode = WRITE; 1267 st->flags &= ~ST_FM_WRITTEN; 1268 flags |= XS_CTL_DATA_OUT; 1269 } else { 1270 cmd.opcode = READ; 1271 flags |= XS_CTL_DATA_IN; 1272 } 1273 1274 /* 1275 * Handle "fixed-block-mode" tape drives by using the 1276 * block count instead of the length. 1277 */ 1278 if (st->flags & ST_FIXEDBLOCKS) { 1279 cmd.byte2 |= SRW_FIXED; 1280 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1281 } else 1282 _lto3b(bp->b_bcount, cmd.len); 1283 1284 /* 1285 * Clear 'position updated' indicator 1286 */ 1287 st->flags &= ~ST_POSUPDATED; 1288 1289 /* 1290 * go ask the adapter to do all this for us 1291 */ 1292 xs = scsipi_make_xs(periph, 1293 (struct scsipi_generic *)&cmd, sizeof(cmd), 1294 (u_char *)bp->b_data, bp->b_bcount, 1295 0, ST_IO_TIME, bp, flags); 1296 if (__predict_false(xs == NULL)) { 1297 /* 1298 * out of memory. Keep this buffer in the queue, and 1299 * retry later. 1300 */ 1301 callout_reset(&st->sc_callout, hz / 2, strestart, 1302 periph); 1303 return; 1304 } 1305 /* 1306 * need to dequeue the buffer before queuing the command, 1307 * because cdstart may be called recursively from the 1308 * HBA driver 1309 */ 1310 #ifdef DIAGNOSTIC 1311 if (BUFQ_GET(st->buf_queue) != bp) 1312 panic("ststart(): dequeued wrong buf"); 1313 #else 1314 BUFQ_GET(st->buf_queue); 1315 #endif 1316 error = scsipi_execute_xs(xs); 1317 /* with a scsipi_xfer preallocated, scsipi_command can't fail */ 1318 KASSERT(error == 0); 1319 } /* go back and see if we can cram more work in.. */ 1320 } 1321 1322 static void 1323 strestart(void *v) 1324 { 1325 int s = splbio(); 1326 ststart((struct scsipi_periph *)v); 1327 splx(s); 1328 } 1329 1330 1331 static void 1332 stdone(struct scsipi_xfer *xs, int error) 1333 { 1334 struct st_softc *st = (void *)xs->xs_periph->periph_dev; 1335 struct buf *bp = xs->bp; 1336 1337 if (bp) { 1338 bp->b_error = error; 1339 bp->b_resid = xs->resid; 1340 if (error) 1341 bp->b_flags |= B_ERROR; 1342 /* 1343 * buggy device ? A SDLT320 can report an info 1344 * field of 0x3de8000 on a Media Error/Write Error 1345 * for this CBD: 0x0a 00 00 80 00 00 1346 */ 1347 if (bp->b_resid > bp->b_bcount || bp->b_resid < 0) 1348 bp->b_resid = bp->b_bcount; 1349 1350 if ((bp->b_flags & B_READ) == B_WRITE) 1351 st->flags |= ST_WRITTEN; 1352 else 1353 st->flags &= ~ST_WRITTEN; 1354 1355 iostat_unbusy(st->stats, bp->b_bcount, 1356 ((bp->b_flags & B_READ) == B_READ)); 1357 1358 #if NRND > 0 1359 rnd_add_uint32(&st->rnd_source, bp->b_blkno); 1360 #endif 1361 1362 if ((st->flags & ST_POSUPDATED) == 0) { 1363 if (error) { 1364 st->fileno = st->blkno = -1; 1365 } else if (st->blkno != -1) { 1366 if (st->flags & ST_FIXEDBLOCKS) 1367 st->blkno += 1368 (bp->b_bcount / st->blksize); 1369 else 1370 st->blkno++; 1371 } 1372 } 1373 1374 biodone(bp); 1375 } 1376 } 1377 1378 static int 1379 stread(dev_t dev, struct uio *uio, int iomode) 1380 { 1381 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1382 1383 return (physio(ststrategy, NULL, dev, B_READ, 1384 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1385 } 1386 1387 static int 1388 stwrite(dev_t dev, struct uio *uio, int iomode) 1389 { 1390 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1391 1392 return (physio(ststrategy, NULL, dev, B_WRITE, 1393 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1394 } 1395 1396 /* 1397 * Perform special action on behalf of the user; 1398 * knows about the internals of this device 1399 */ 1400 static int 1401 stioctl(dev_t dev, u_long cmd, caddr_t arg, int flag, struct lwp *l) 1402 { 1403 int error = 0; 1404 int unit; 1405 int number, nmarks, dsty; 1406 int flags; 1407 struct st_softc *st; 1408 int hold_blksize; 1409 u_int8_t hold_density; 1410 struct mtop *mt = (struct mtop *) arg; 1411 1412 /* 1413 * Find the device that the user is talking about 1414 */ 1415 flags = 0; /* give error messages, act on errors etc. */ 1416 unit = STUNIT(dev); 1417 dsty = STDSTY(dev); 1418 st = st_cd.cd_devs[unit]; 1419 hold_blksize = st->blksize; 1420 hold_density = st->density; 1421 1422 switch ((u_int) cmd) { 1423 1424 case MTIOCGET: { 1425 struct mtget *g = (struct mtget *) arg; 1426 /* 1427 * (to get the current state of READONLY) 1428 */ 1429 error = st->ops(st, ST_OPS_MODESENSE, XS_CTL_SILENT); 1430 if (error) { 1431 /* 1432 * Ignore the error if in control mode; 1433 * this is mandated by st(4). 1434 */ 1435 if (STMODE(dev) != CTRL_MODE) 1436 break; 1437 error = 0; 1438 } 1439 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1440 memset(g, 0, sizeof(struct mtget)); 1441 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1442 g->mt_blksiz = st->blksize; 1443 g->mt_density = st->density; 1444 g->mt_mblksiz[0] = st->modes[0].blksize; 1445 g->mt_mblksiz[1] = st->modes[1].blksize; 1446 g->mt_mblksiz[2] = st->modes[2].blksize; 1447 g->mt_mblksiz[3] = st->modes[3].blksize; 1448 g->mt_mdensity[0] = st->modes[0].density; 1449 g->mt_mdensity[1] = st->modes[1].density; 1450 g->mt_mdensity[2] = st->modes[2].density; 1451 g->mt_mdensity[3] = st->modes[3].density; 1452 g->mt_fileno = st->fileno; 1453 g->mt_blkno = st->blkno; 1454 if (st->flags & ST_READONLY) 1455 g->mt_dsreg |= MT_DS_RDONLY; 1456 if (st->flags & ST_MOUNTED) 1457 g->mt_dsreg |= MT_DS_MOUNTED; 1458 g->mt_resid = st->mt_resid; 1459 g->mt_erreg = st->mt_erreg; 1460 /* 1461 * clear latched errors. 1462 */ 1463 st->mt_resid = 0; 1464 st->mt_erreg = 0; 1465 st->asc = 0; 1466 st->ascq = 0; 1467 break; 1468 } 1469 case MTIOCTOP: { 1470 1471 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1472 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1473 mt->mt_count)); 1474 1475 /* compat: in U*x it is a short */ 1476 number = mt->mt_count; 1477 switch ((short) (mt->mt_op)) { 1478 case MTWEOF: /* write an end-of-file record */ 1479 error = st_write_filemarks(st, number, flags); 1480 break; 1481 case MTBSF: /* backward space file */ 1482 number = -number; 1483 case MTFSF: /* forward space file */ 1484 error = st_check_eod(st, FALSE, &nmarks, flags); 1485 if (!error) 1486 error = st_space(st, number - nmarks, 1487 SP_FILEMARKS, flags); 1488 break; 1489 case MTBSR: /* backward space record */ 1490 number = -number; 1491 case MTFSR: /* forward space record */ 1492 error = st_check_eod(st, TRUE, &nmarks, flags); 1493 if (!error) 1494 error = st_space(st, number, SP_BLKS, flags); 1495 break; 1496 case MTREW: /* rewind */ 1497 error = st_rewind(st, 0, flags); 1498 break; 1499 case MTOFFL: /* rewind and put the drive offline */ 1500 st_unmount(st, EJECT); 1501 break; 1502 case MTNOP: /* no operation, sets status only */ 1503 break; 1504 case MTRETEN: /* retension the tape */ 1505 error = st_load(st, LD_RETENSION, flags); 1506 if (!error) 1507 error = st_load(st, LD_LOAD, flags); 1508 break; 1509 case MTEOM: /* forward space to end of media */ 1510 error = st_check_eod(st, FALSE, &nmarks, flags); 1511 if (!error) 1512 error = st_space(st, 1, SP_EOM, flags); 1513 break; 1514 case MTCACHE: /* enable controller cache */ 1515 st->flags &= ~ST_DONTBUFFER; 1516 goto try_new_value; 1517 case MTNOCACHE: /* disable controller cache */ 1518 st->flags |= ST_DONTBUFFER; 1519 goto try_new_value; 1520 case MTERASE: /* erase volume */ 1521 error = st_erase(st, number, flags); 1522 break; 1523 case MTSETBSIZ: /* Set block size for device */ 1524 #ifdef NOTYET 1525 if (!(st->flags & ST_NEW_MOUNT)) { 1526 uprintf("re-mount tape before changing blocksize"); 1527 error = EINVAL; 1528 break; 1529 } 1530 #endif 1531 if (number == 0) 1532 st->flags &= ~ST_FIXEDBLOCKS; 1533 else { 1534 if ((st->blkmin || st->blkmax) && 1535 (number < st->blkmin || 1536 number > st->blkmax)) { 1537 error = EINVAL; 1538 break; 1539 } 1540 st->flags |= ST_FIXEDBLOCKS; 1541 } 1542 st->blksize = number; 1543 st->flags |= ST_BLOCK_SET; /*XXX */ 1544 goto try_new_value; 1545 1546 case MTSETDNSTY: /* Set density for device and mode */ 1547 /* 1548 * Any number >= 0 and <= 0xff is legal. Numbers 1549 * above 0x80 are 'vendor unique'. 1550 */ 1551 if (number < 0 || number > 255) { 1552 error = EINVAL; 1553 break; 1554 } else 1555 st->density = number; 1556 goto try_new_value; 1557 1558 case MTCMPRESS: 1559 error = st->ops(st, (number == 0) ? 1560 ST_OPS_CMPRSS_OFF : ST_OPS_CMPRSS_ON, 1561 XS_CTL_SILENT); 1562 break; 1563 1564 case MTEWARN: 1565 if (number) 1566 st->flags |= ST_EARLYWARN; 1567 else 1568 st->flags &= ~ST_EARLYWARN; 1569 break; 1570 1571 default: 1572 error = EINVAL; 1573 } 1574 break; 1575 } 1576 case MTIOCIEOT: 1577 case MTIOCEEOT: 1578 break; 1579 1580 case MTIOCRDSPOS: 1581 error = st_rdpos(st, 0, (u_int32_t *) arg); 1582 break; 1583 1584 case MTIOCRDHPOS: 1585 error = st_rdpos(st, 1, (u_int32_t *) arg); 1586 break; 1587 1588 case MTIOCSLOCATE: 1589 error = st_setpos(st, 0, (u_int32_t *) arg); 1590 break; 1591 1592 case MTIOCHLOCATE: 1593 error = st_setpos(st, 1, (u_int32_t *) arg); 1594 break; 1595 1596 1597 default: 1598 error = scsipi_do_ioctl(st->sc_periph, dev, cmd, arg, 1599 flag, l); 1600 break; 1601 } 1602 return (error); 1603 /*-----------------------------*/ 1604 try_new_value: 1605 /* 1606 * Check that the mode being asked for is aggreeable to the 1607 * drive. If not, put it back the way it was. 1608 * 1609 * If in control mode, we can make (persistent) mode changes 1610 * even if no medium is loaded (see st(4)). 1611 */ 1612 if ((STMODE(dev) != CTRL_MODE || (st->flags & ST_MOUNTED) != 0) && 1613 (error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 1614 /* put it back as it was */ 1615 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 1616 st->density = hold_density; 1617 st->blksize = hold_blksize; 1618 if (st->blksize) 1619 st->flags |= ST_FIXEDBLOCKS; 1620 else 1621 st->flags &= ~ST_FIXEDBLOCKS; 1622 return (error); 1623 } 1624 /* 1625 * As the drive liked it, if we are setting a new default, 1626 * set it into the structures as such. 1627 * 1628 * The means for deciding this are not finalised yet- but 1629 * if the device was opened in Control Mode, the values 1630 * are persistent now across mounts. 1631 */ 1632 if (STMODE(dev) == CTRL_MODE) { 1633 switch ((short) (mt->mt_op)) { 1634 case MTSETBSIZ: 1635 st->modes[dsty].blksize = st->blksize; 1636 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1637 break; 1638 case MTSETDNSTY: 1639 st->modes[dsty].density = st->density; 1640 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1641 break; 1642 } 1643 } 1644 return (0); 1645 } 1646 1647 /* 1648 * Do a synchronous read. 1649 */ 1650 static int 1651 st_read(struct st_softc *st, char *bf, int size, int flags) 1652 { 1653 struct scsi_rw_tape cmd; 1654 1655 /* 1656 * If it's a null transfer, return immediatly 1657 */ 1658 if (size == 0) 1659 return (0); 1660 memset(&cmd, 0, sizeof(cmd)); 1661 cmd.opcode = READ; 1662 if (st->flags & ST_FIXEDBLOCKS) { 1663 cmd.byte2 |= SRW_FIXED; 1664 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1665 cmd.len); 1666 } else 1667 _lto3b(size, cmd.len); 1668 return (scsipi_command(st->sc_periph, 1669 (void *)&cmd, sizeof(cmd), (void *)bf, size, 0, ST_IO_TIME, NULL, 1670 flags | XS_CTL_DATA_IN)); 1671 } 1672 1673 /* 1674 * issue an erase command 1675 */ 1676 static int 1677 st_erase(struct st_softc *st, int full, int flags) 1678 { 1679 int tmo; 1680 struct scsi_erase cmd; 1681 1682 /* 1683 * Full erase means set LONG bit in erase command, which asks 1684 * the drive to erase the entire unit. Without this bit, we're 1685 * asking the drive to write an erase gap. 1686 */ 1687 memset(&cmd, 0, sizeof(cmd)); 1688 cmd.opcode = ERASE; 1689 if (full) { 1690 cmd.byte2 = SE_LONG; 1691 tmo = ST_SPC_TIME; 1692 } else { 1693 tmo = ST_IO_TIME; 1694 } 1695 1696 /* 1697 * XXX We always do this asynchronously, for now, unless the device 1698 * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we 1699 * want to (eventually) to it synchronously? 1700 */ 1701 if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) 1702 cmd.byte2 |= SE_IMMED; 1703 1704 return (scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1705 ST_RETRIES, tmo, NULL, flags)); 1706 } 1707 1708 /* 1709 * skip N blocks/filemarks/seq filemarks/eom 1710 */ 1711 static int 1712 st_space(struct st_softc *st, int number, u_int what, int flags) 1713 { 1714 struct scsi_space cmd; 1715 int error; 1716 1717 switch (what) { 1718 case SP_BLKS: 1719 if (st->flags & ST_PER_ACTION) { 1720 if (number > 0) { 1721 st->flags &= ~ST_PER_ACTION; 1722 return (EIO); 1723 } else if (number < 0) { 1724 if (st->flags & ST_AT_FILEMARK) { 1725 /* 1726 * Handling of ST_AT_FILEMARK 1727 * in st_space will fill in the 1728 * right file mark count. 1729 */ 1730 error = st_space(st, 0, SP_FILEMARKS, 1731 flags); 1732 if (error) 1733 return (error); 1734 } 1735 if (st->flags & ST_BLANK_READ) { 1736 st->flags &= ~ST_BLANK_READ; 1737 return (EIO); 1738 } 1739 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1740 } 1741 } 1742 break; 1743 case SP_FILEMARKS: 1744 if (st->flags & ST_EIO_PENDING) { 1745 if (number > 0) { 1746 /* pretend we just discovered the error */ 1747 st->flags &= ~ST_EIO_PENDING; 1748 return (EIO); 1749 } else if (number < 0) { 1750 /* back away from the error */ 1751 st->flags &= ~ST_EIO_PENDING; 1752 } 1753 } 1754 if (st->flags & ST_AT_FILEMARK) { 1755 st->flags &= ~ST_AT_FILEMARK; 1756 number--; 1757 } 1758 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1759 /* back away from unwritten tape */ 1760 st->flags &= ~ST_BLANK_READ; 1761 number++; /* XXX dubious */ 1762 } 1763 break; 1764 case SP_EOM: 1765 if (st->flags & ST_EOM_PENDING) { 1766 /* we're already there */ 1767 st->flags &= ~ST_EOM_PENDING; 1768 return (0); 1769 } 1770 if (st->flags & ST_EIO_PENDING) { 1771 /* pretend we just discovered the error */ 1772 st->flags &= ~ST_EIO_PENDING; 1773 return (EIO); 1774 } 1775 if (st->flags & ST_AT_FILEMARK) 1776 st->flags &= ~ST_AT_FILEMARK; 1777 break; 1778 } 1779 if (number == 0) 1780 return (0); 1781 1782 memset(&cmd, 0, sizeof(cmd)); 1783 cmd.opcode = SPACE; 1784 cmd.byte2 = what; 1785 _lto3b(number, cmd.number); 1786 1787 st->flags &= ~ST_POSUPDATED; 1788 st->last_ctl_resid = 0; 1789 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1790 0, ST_SPC_TIME, NULL, flags); 1791 1792 if (error == 0 && (st->flags & ST_POSUPDATED) == 0) { 1793 number = number - st->last_ctl_resid; 1794 if (what == SP_BLKS) { 1795 if (st->blkno != -1) { 1796 st->blkno += number; 1797 } 1798 } else if (what == SP_FILEMARKS) { 1799 if (st->fileno != -1) { 1800 st->fileno += number; 1801 if (number > 0) { 1802 st->blkno = 0; 1803 } else if (number < 0) { 1804 st->blkno = -1; 1805 } 1806 } 1807 } else if (what == SP_EOM) { 1808 /* 1809 * This loses us relative position. 1810 */ 1811 st->fileno = st->blkno = -1; 1812 } 1813 } 1814 return (error); 1815 } 1816 1817 /* 1818 * write N filemarks 1819 */ 1820 static int 1821 st_write_filemarks(struct st_softc *st, int number, int flags) 1822 { 1823 int error; 1824 struct scsi_write_filemarks cmd; 1825 1826 /* 1827 * It's hard to write a negative number of file marks. 1828 * Don't try. 1829 */ 1830 if (number < 0) 1831 return (EINVAL); 1832 switch (number) { 1833 case 0: /* really a command to sync the drive's buffers */ 1834 break; 1835 case 1: 1836 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1837 st->flags &= ~ST_WRITTEN; 1838 else 1839 st->flags |= ST_FM_WRITTEN; 1840 st->flags &= ~ST_PER_ACTION; 1841 break; 1842 default: 1843 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1844 } 1845 1846 memset(&cmd, 0, sizeof(cmd)); 1847 cmd.opcode = WRITE_FILEMARKS; 1848 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1849 cmd.byte2 = SR_IMMED; 1850 /* 1851 * The ATAPI Onstream DI-30 doesn't support writing filemarks, but 1852 * WRITE_FILEMARKS is still used to flush the buffer 1853 */ 1854 if ((st->quirks & ST_Q_NOFILEMARKS) == 0) 1855 _lto3b(number, cmd.number); 1856 1857 /* XXX WE NEED TO BE ABLE TO GET A RESIDIUAL XXX */ 1858 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1859 0, ST_IO_TIME * 4, NULL, flags); 1860 if (error == 0 && st->fileno != -1) { 1861 st->fileno += number; 1862 } 1863 return (error); 1864 } 1865 1866 /* 1867 * Make sure the right number of file marks is on tape if the 1868 * tape has been written. If the position argument is true, 1869 * leave the tape positioned where it was originally. 1870 * 1871 * nmarks returns the number of marks to skip (or, if position 1872 * true, which were skipped) to get back original position. 1873 */ 1874 static int 1875 st_check_eod(struct st_softc *st, boolean position, int *nmarks, int flags) 1876 { 1877 int error; 1878 1879 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1880 default: 1881 *nmarks = 0; 1882 return (0); 1883 case ST_WRITTEN: 1884 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1885 *nmarks = 1; 1886 break; 1887 case ST_WRITTEN | ST_2FM_AT_EOD: 1888 *nmarks = 2; 1889 } 1890 error = st_write_filemarks(st, *nmarks, flags); 1891 if (position && !error) 1892 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1893 return (error); 1894 } 1895 1896 /* 1897 * load/unload/retension 1898 */ 1899 static int 1900 st_load(struct st_softc *st, u_int type, int flags) 1901 { 1902 int error; 1903 struct scsi_load cmd; 1904 1905 if (type != LD_LOAD) { 1906 int nmarks; 1907 1908 error = st_check_eod(st, FALSE, &nmarks, flags); 1909 if (error) { 1910 printf("%s: failed to write closing filemarks at " 1911 "unload, errno=%d\n", st->sc_dev.dv_xname, error); 1912 return (error); 1913 } 1914 } 1915 if (st->quirks & ST_Q_IGNORE_LOADS) { 1916 if (type == LD_LOAD) { 1917 /* 1918 * If we ignore loads, at least we should try a rewind. 1919 */ 1920 return st_rewind(st, 0, flags); 1921 } 1922 /* otherwise, we should do what's asked of us */ 1923 } 1924 1925 memset(&cmd, 0, sizeof(cmd)); 1926 cmd.opcode = LOAD; 1927 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1928 cmd.byte2 = SR_IMMED; 1929 cmd.how = type; 1930 1931 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1932 ST_RETRIES, ST_SPC_TIME, NULL, flags); 1933 if (error) { 1934 printf("%s: error %d in st_load (op %d)\n", 1935 st->sc_dev.dv_xname, error, type); 1936 } 1937 return (error); 1938 } 1939 1940 /* 1941 * Rewind the device 1942 */ 1943 static int 1944 st_rewind(struct st_softc *st, u_int immediate, int flags) 1945 { 1946 struct scsi_rewind cmd; 1947 int error; 1948 int nmarks; 1949 1950 error = st_check_eod(st, FALSE, &nmarks, flags); 1951 if (error) { 1952 printf("%s: failed to write closing filemarks at " 1953 "rewind, errno=%d\n", st->sc_dev.dv_xname, error); 1954 return (error); 1955 } 1956 st->flags &= ~ST_PER_ACTION; 1957 1958 /* 1959 * ATAPI tapes always need immediate to be set 1960 */ 1961 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1962 immediate = SR_IMMED; 1963 1964 memset(&cmd, 0, sizeof(cmd)); 1965 cmd.opcode = REWIND; 1966 cmd.byte2 = immediate; 1967 1968 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1969 ST_RETRIES, immediate ? ST_CTL_TIME: ST_SPC_TIME, NULL, flags); 1970 if (error) { 1971 printf("%s: error %d trying to rewind\n", 1972 st->sc_dev.dv_xname, error); 1973 /* lost position */ 1974 st->fileno = st->blkno = -1; 1975 } else { 1976 st->fileno = st->blkno = 0; 1977 } 1978 return (error); 1979 } 1980 1981 static int 1982 st_rdpos(struct st_softc *st, int hard, u_int32_t *blkptr) 1983 { 1984 int error; 1985 u_int8_t posdata[20]; 1986 struct scsi_tape_read_position cmd; 1987 1988 /* 1989 * We try and flush any buffered writes here if we were writing 1990 * and we're trying to get hardware block position. It eats 1991 * up performance substantially, but I'm wary of drive firmware. 1992 * 1993 * I think that *logical* block position is probably okay- 1994 * but hardware block position might have to wait for data 1995 * to hit media to be valid. Caveat Emptor. 1996 */ 1997 1998 if (hard && (st->flags & ST_WRITTEN)) { 1999 /* 2000 * First flush any pending writes... 2001 */ 2002 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 2003 /* 2004 * The latter case is for 'write protected' tapes 2005 * which are too stupid to recognize a zero count 2006 * for writing filemarks as a no-op. 2007 */ 2008 if (error != 0 && error != EACCES && error != EROFS) 2009 return (error); 2010 } 2011 2012 memset(&cmd, 0, sizeof(cmd)); 2013 memset(&posdata, 0, sizeof(posdata)); 2014 cmd.opcode = READ_POSITION; 2015 if (hard) 2016 cmd.byte1 = 1; 2017 2018 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 2019 (void *)&posdata, sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 2020 XS_CTL_SILENT | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 2021 2022 if (error == 0) { 2023 #if 0 2024 printf("posdata:"); 2025 for (hard = 0; hard < sizeof(posdata); hard++) 2026 printf("%02x ", posdata[hard] & 0xff); 2027 printf("\n"); 2028 #endif 2029 if (posdata[0] & 0x4) /* Block Position Unknown */ 2030 error = EINVAL; 2031 else 2032 *blkptr = _4btol(&posdata[4]); 2033 } 2034 return (error); 2035 } 2036 2037 static int 2038 st_setpos(struct st_softc *st, int hard, u_int32_t *blkptr) 2039 { 2040 int error; 2041 struct scsi_tape_locate cmd; 2042 2043 /* 2044 * We used to try and flush any buffered writes here. 2045 * Now we push this onto user applications to either 2046 * flush the pending writes themselves (via a zero count 2047 * WRITE FILEMARKS command) or they can trust their tape 2048 * drive to do this correctly for them. 2049 * 2050 * There are very ugly performance limitations otherwise. 2051 */ 2052 2053 memset(&cmd, 0, sizeof(cmd)); 2054 cmd.opcode = LOCATE; 2055 if (hard) 2056 cmd.byte2 = 1 << 2; 2057 _lto4b(*blkptr, cmd.blkaddr); 2058 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 2059 ST_RETRIES, ST_SPC_TIME, NULL, 0); 2060 /* 2061 * Note file && block number position now unknown (if 2062 * these things ever start being maintained in this driver) 2063 */ 2064 st->fileno = st->blkno = -1; 2065 return (error); 2066 } 2067 2068 2069 /* 2070 * Look at the returned sense and act on the error and determine 2071 * the unix error number to pass back..., 0 (== report no error), 2072 * -1 = retry the operation, -2 continue error processing. 2073 */ 2074 static int 2075 st_interpret_sense(struct scsipi_xfer *xs) 2076 { 2077 struct scsipi_periph *periph = xs->xs_periph; 2078 struct scsi_sense_data *sense = &xs->sense.scsi_sense; 2079 struct buf *bp = xs->bp; 2080 struct st_softc *st = (void *)periph->periph_dev; 2081 int retval = EJUSTRETURN; 2082 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 2083 u_int8_t key; 2084 int32_t info; 2085 2086 /* 2087 * If it isn't a extended or extended/deferred error, let 2088 * the generic code handle it. 2089 */ 2090 if (SSD_RCODE(sense->response_code) != SSD_RCODE_CURRENT && 2091 SSD_RCODE(sense->response_code) != SSD_RCODE_DEFERRED) 2092 return (retval); 2093 2094 if (sense->response_code & SSD_RCODE_VALID) 2095 info = _4btol(sense->info); 2096 else 2097 info = (st->flags & ST_FIXEDBLOCKS) ? 2098 xs->datalen / st->blksize : xs->datalen; 2099 key = SSD_SENSE_KEY(sense->flags); 2100 st->mt_erreg = key; 2101 st->asc = sense->asc; 2102 st->ascq = sense->ascq; 2103 st->mt_resid = (short) info; 2104 2105 if (key == SKEY_NOT_READY && st->asc == 0x4 && st->ascq == 0x1) { 2106 /* Not Ready, Logical Unit Is in Process Of Becoming Ready */ 2107 if (!callout_pending(&periph->periph_callout)) 2108 scsipi_periph_freeze(periph, 1); 2109 callout_reset(&periph->periph_callout, 2110 hz, scsipi_periph_timed_thaw, periph); 2111 return (ERESTART); 2112 } 2113 2114 /* 2115 * If the device is not open yet, let generic handle 2116 */ 2117 if ((periph->periph_flags & PERIPH_OPEN) == 0) { 2118 return (retval); 2119 } 2120 2121 xs->resid = info; 2122 if (st->flags & ST_FIXEDBLOCKS) { 2123 if (bp) { 2124 xs->resid *= st->blksize; 2125 st->last_io_resid = xs->resid; 2126 } else { 2127 st->last_ctl_resid = xs->resid; 2128 } 2129 if (key == SKEY_VOLUME_OVERFLOW) { 2130 st->flags |= ST_EIO_PENDING; 2131 if (bp) 2132 bp->b_resid = xs->resid; 2133 } else if (sense->flags & SSD_EOM) { 2134 if ((st->flags & ST_EARLYWARN) == 0) 2135 st->flags |= ST_EIO_PENDING; 2136 st->flags |= ST_EOM_PENDING; 2137 if (bp) { 2138 #if 0 2139 bp->b_resid = xs->resid; 2140 #else 2141 /* 2142 * Grotesque as it seems, the few times 2143 * I've actually seen a non-zero resid, 2144 * the tape drive actually lied and had 2145 * written all the data! 2146 */ 2147 bp->b_resid = 0; 2148 #endif 2149 } 2150 } 2151 if (sense->flags & SSD_FILEMARK) { 2152 st->flags |= ST_AT_FILEMARK; 2153 if (bp) 2154 bp->b_resid = xs->resid; 2155 if (st->fileno != (daddr_t) -1) { 2156 st->fileno++; 2157 st->blkno = 0; 2158 st->flags |= ST_POSUPDATED; 2159 } 2160 } 2161 if (sense->flags & SSD_ILI) { 2162 st->flags |= ST_EIO_PENDING; 2163 if (bp) 2164 bp->b_resid = xs->resid; 2165 if (sense->response_code & SSD_RCODE_VALID && 2166 (xs->xs_control & XS_CTL_SILENT) == 0) 2167 printf("%s: block wrong size, %d blocks " 2168 "residual\n", st->sc_dev.dv_xname, info); 2169 2170 /* 2171 * This quirk code helps the drive read 2172 * the first tape block, regardless of 2173 * format. That is required for these 2174 * drives to return proper MODE SENSE 2175 * information. 2176 */ 2177 if ((st->quirks & ST_Q_SENSE_HELP) && 2178 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 2179 st->blksize -= 512; 2180 else if ((st->flags & ST_POSUPDATED) == 0) { 2181 if (st->blkno != (daddr_t) -1) { 2182 st->blkno += 2183 (xs->datalen / st->blksize); 2184 st->flags |= ST_POSUPDATED; 2185 } 2186 } 2187 } 2188 /* 2189 * If data wanted and no data was transferred, do it immediately 2190 */ 2191 if (xs->datalen && xs->resid >= xs->datalen) { 2192 if (st->flags & ST_EIO_PENDING) 2193 return (EIO); 2194 if (st->flags & ST_AT_FILEMARK) { 2195 if (bp) 2196 bp->b_resid = xs->resid; 2197 return (0); 2198 } 2199 } 2200 } else { /* must be variable mode */ 2201 if (bp) { 2202 st->last_io_resid = xs->resid; 2203 } else { 2204 st->last_ctl_resid = xs->resid; 2205 } 2206 if (sense->flags & SSD_EOM) { 2207 /* 2208 * The current semantics of this 2209 * driver requires EOM detection 2210 * to return EIO unless early 2211 * warning detection is enabled 2212 * for variable mode (this is always 2213 * on for fixed block mode). 2214 */ 2215 if (st->flags & ST_EARLYWARN) { 2216 st->flags |= ST_EOM_PENDING; 2217 retval = 0; 2218 } else { 2219 retval = EIO; 2220 } 2221 2222 /* 2223 * If it's an unadorned EOM detection, 2224 * suppress printing an error. 2225 */ 2226 if (key == SKEY_NO_SENSE) { 2227 doprint = 0; 2228 } 2229 } else if (sense->flags & SSD_FILEMARK) { 2230 retval = 0; 2231 if (st->fileno != (daddr_t) -1) { 2232 st->fileno++; 2233 st->blkno = 0; 2234 st->flags |= ST_POSUPDATED; 2235 } 2236 } else if (sense->flags & SSD_ILI) { 2237 if (info < 0) { 2238 /* 2239 * The tape record was bigger than the read 2240 * we issued. 2241 */ 2242 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2243 printf("%s: %d-byte tape record too big" 2244 " for %d-byte user buffer\n", 2245 st->sc_dev.dv_xname, 2246 xs->datalen - info, xs->datalen); 2247 } 2248 retval = EIO; 2249 } else { 2250 retval = 0; 2251 if (st->blkno != (daddr_t) -1) { 2252 st->blkno++; 2253 st->flags |= ST_POSUPDATED; 2254 } 2255 } 2256 } 2257 if (bp) 2258 bp->b_resid = info; 2259 } 2260 2261 #ifndef SCSIPI_DEBUG 2262 if (retval == 0 && key == SKEY_NO_SENSE) 2263 doprint = 0; 2264 #endif 2265 if (key == SKEY_BLANK_CHECK) { 2266 /* 2267 * This quirk code helps the drive read the 2268 * first tape block, regardless of format. That 2269 * is required for these drives to return proper 2270 * MODE SENSE information. 2271 */ 2272 if ((st->quirks & ST_Q_SENSE_HELP) && 2273 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 2274 /* still starting */ 2275 st->blksize -= 512; 2276 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2277 st->flags |= ST_BLANK_READ; 2278 xs->resid = xs->datalen; 2279 if (bp) { 2280 bp->b_resid = xs->resid; 2281 /* return an EOF */ 2282 } 2283 retval = 0; 2284 /* lost position */ 2285 st->fileno = st->blkno = -1; 2286 } 2287 } 2288 2289 /* 2290 * If generic sense processing will continue, we should not 2291 * print sense info here. 2292 */ 2293 if (retval == EJUSTRETURN) 2294 doprint = 0; 2295 2296 if (doprint) { 2297 #ifdef SCSIVERBOSE 2298 scsipi_print_sense(xs, 0); 2299 #else 2300 scsipi_printaddr(periph); 2301 printf("Sense Key 0x%02x", key); 2302 if ((sense->response_code & SSD_RCODE_VALID) != 0) { 2303 switch (key) { 2304 case SKEY_NOT_READY: 2305 case SKEY_ILLEGAL_REQUEST: 2306 case SKEY_UNIT_ATTENTION: 2307 case SKEY_DATA_PROTECT: 2308 break; 2309 case SKEY_VOLUME_OVERFLOW: 2310 case SKEY_BLANK_CHECK: 2311 printf(", requested size: %d (decimal)", info); 2312 break; 2313 case SKEY_ABORTED_COMMAND: 2314 if (xs->xs_retries) 2315 printf(", retrying"); 2316 printf(", cmd 0x%x, info 0x%x", 2317 xs->cmd->opcode, info); 2318 break; 2319 default: 2320 printf(", info = %d (decimal)", info); 2321 } 2322 } 2323 if (sense->extra_len != 0) { 2324 int n; 2325 printf(", data ="); 2326 for (n = 0; n < sense->extra_len; n++) 2327 printf(" %02x", sense->csi[n]); 2328 } 2329 printf("\n"); 2330 #endif 2331 } 2332 return (retval); 2333 } 2334 2335 /* 2336 * The quirk here is that the drive returns some value to st_mode_sense 2337 * incorrectly until the tape has actually passed by the head. 2338 * 2339 * The method is to set the drive to large fixed-block state (user-specified 2340 * density and 1024-byte blocks), then read and rewind to get it to sense the 2341 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2342 * work, as a last resort, try variable- length blocks. The result will be 2343 * the ability to do an accurate st_mode_sense. 2344 * 2345 * We know we can do a rewind because we just did a load, which implies rewind. 2346 * Rewind seems preferable to space backward if we have a virgin tape. 2347 * 2348 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2349 * error processing, both part of st_interpret_sense. 2350 */ 2351 static int 2352 st_touch_tape(struct st_softc *st) 2353 { 2354 char *bf; 2355 int readsize; 2356 int error; 2357 2358 bf = malloc(1024, M_TEMP, M_NOWAIT); 2359 if (bf == NULL) 2360 return (ENOMEM); 2361 2362 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 2363 goto bad; 2364 2365 /* 2366 * If the block size is already known from the 2367 * sense data, use it. Else start probing at 1024. 2368 */ 2369 if (st->media_blksize > 0) 2370 st->blksize = st->media_blksize; 2371 else 2372 st->blksize = 1024; 2373 2374 do { 2375 switch (st->blksize) { 2376 case 512: 2377 case 1024: 2378 readsize = st->blksize; 2379 st->flags |= ST_FIXEDBLOCKS; 2380 break; 2381 default: 2382 readsize = 1; 2383 st->flags &= ~ST_FIXEDBLOCKS; 2384 } 2385 if ((error = st->ops(st, ST_OPS_MODESELECT, XS_CTL_SILENT)) 2386 != 0) { 2387 /* 2388 * The device did not agree with the proposed 2389 * block size. If we exhausted our options, 2390 * return failure, else try another. 2391 */ 2392 if (readsize == 1) 2393 goto bad; 2394 st->blksize -= 512; 2395 continue; 2396 } 2397 st_read(st, bf, readsize, XS_CTL_SILENT); /* XXX */ 2398 if ((error = st_rewind(st, 0, 0)) != 0) { 2399 bad: free(bf, M_TEMP); 2400 return (error); 2401 } 2402 } while (readsize != 1 && readsize > st->blksize); 2403 2404 free(bf, M_TEMP); 2405 return (0); 2406 } 2407 2408 static int 2409 stdump(dev_t dev, daddr_t blkno, caddr_t va, 2410 size_t size) 2411 { 2412 2413 /* Not implemented. */ 2414 return (ENXIO); 2415 } 2416
Indexes created Fri Sep 26 20:09:58 GMT 2025